Type-writing machine.



O. WOODWARD.

TYPE WRITING MACHINE. APPLICATION FILED MAR.23,1908.

Patented July 12,1910.

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FILED MAR.23,1908

TYPE WI HTINGM APPLICATION Patented July 12 2 SHEETS-SHEET 2.

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'l-IIS ATTEIRNEY OSCAR woonwen'b, or MONTCLAIR, NEW CHINE COMPANY, or ILION, New Y JERSEY, ASSIGNOR TU YOSI WRITING MAE ORK, A CORPORATIGN NEW YORK.

TYPE-WRITING MACI-HNE.

Specillcation of Letters Patent.

li at ented July 12, 1910,-

Application filed March 23,4998. Serial No. $522,710.

To all whom "it may concern:

Be it known that I, OSCAR WoonwannQ citizen of the United States, and resident of Montclair, 1n the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

My invention relates to typewriting machines and more particularly to case shift I mechanism.

merits of parts and combinations of devices to be hereinafter described and particularly pointed out in the appended'claims.

In the drawings, wherein like reference characters indicate corresponding parts in the various views, Figure 1 is a vertical front to rear sectional view of one form of typewritingmachine embodying my invention, suflicient parts of-a typewriting machine being shown to illustrate my invendetail sectional view taken arrows at said line.

. base 1, corner posts tion-in' its application thereto. Fig. 2 is a'fragmentary side view showing the ease shift keys and means for locking the parts in shifted position. Fig. 3 is a fragmentary on the line m-w ofFigl' 1 and looking in the direction of the Fig. l'is a detail per-. spective. View showing the shift keys and thedevices with which they are associated.

.The frame of the "machine comprises a 2 and a tope plate'S. Fixed guide rails i and 5 are grooved upon opposite faces thereof for cotiperation with anti-friction balls 6 which likewise cotiperate with oppositely grooved rails 7 of a carriage truck 8. Parallel links 9 and 10 are pivoted to the truck at 11 and 12 respectively and are likewise pivoted M13 and 14 respectively to a platen frame 15 in which a cylindrical platen 16 is journaled. A cross bar 17 connects the lower set of parallel links 10', whereas cross bars1'8 and 19 unite the side plates of the platen frame. The

lowermostcross. bar 19 of the platen frame carries a depending bracket arm 20 which e -v in} turn carries a grooved roller 21 ccoperative with a shift rail 22. This shift. rail is supported upon downwardly extending links 23 guided by grooved rollers 24 pivotally supported on brackets 25 secured to a cross bar 26 attached to the frame of the machine. The lower ends of the depending links 28 are connected to rearwardly extending arms of shift key levers 27 and 28. These shift key levers are rigidly connected to an intermediaterock shaft 29 pivotally supportedrat its ends on suitable bearing screws in the base of the ma-. chine. 1 Each of the shift key levers 27 and 28 has' a depending arm 30 provided with a'hook 31 for engagement with one end of a cons tractile counter-balancing spring 32 which tends to overcome the weight of'theplaten and the platen frame in order that these parts may be more easily shifted to the upper case position. The opposite end of each of the springs 32 is secured to the base of the machine as at 33. The shift let er 27 is situated at the right-hand side of the key board of the machine and carries a rigidly connected shift key 3%. The shift lever 28,

on theother han is situated at the left hand side of the keyboard and is provided with a rigidly connected shift key. 35. These shift keys 34 and 35 may be termed te'mporary shift keys, the purpose of which is to effect a relative shift between the platen and the type bars, one of the latter being represented at 36 in Fig. 1 and when pressure is releasedon either of the temporary 9o shift keys 34; and 35 the platen will be to stored by the weight thereof and of the platen frame to the lowermost or lower case position shown in full lines in Fig. 1.

In order that the platen may be locked in its uppermost or uppercase position indi cated in dotted lines in Fig, 1, I have pro-r vided a shift lock key 37 pivoted to the shift lever 28 as indicated at 38.. It will be observed that the pivot 38 is oif-setto one side or rearwardly'of the key 37 so that a downward pressure exerted on the key 37 tends to turn the key on its pivot 38 as well as to depress the associated shift lever 28. The key 37 has a hook-like engaging portion 39. which extends below the shift lever. A; stop pin 40 projects laterally from the shift key 37 and abuts the lower QdQC'Of-ytllGfSlll'fl) leven; when the shift key, is,-: in the normal position relatively to the shift lever 28 as .the movement of the latter around shown in Fig. 1. A contractile spring 41 is connected at one end to the depending portion of the locking shift key 37 and is connected at its opposite end to a depending arm 42 on the shift lever. This spring tends to maintain the stop against 'the shift lever 28 and tends to maintain the key 37 in normal position relatively to the lever 28.

An engaging member 43 is carried by a fixed portion of the machine for coiiperation with the engaging portion 39 on the locking shift key 37. In the present instance this fixed engaging member comprises a bracket-like member which is fulcrumed on a rib or projection 44 on the upper face of a lug 45 which projects inwardly from the left-hand base plate 1 of the machine. Set screws 46 and 47 extend freely through openings in the lug 45 on opposite sides of the fulcrum 44. Each of these screws is received at its threaded end in a threadedopening in the engaging member 43. A plate 48 is formed as a part of the engaging member and extends into the path of the engaging portion 39 of the locking key in its pivot 38. This plate-like engaging portion 48 is preferably inclined as shown in Fig. 1. By adjusting the screws 46 and 47 the member 43 may be adjusted around the fulcrum 44 to raise or lower the lower engaging edge 49 of the member 43, thus regulating the member 43 to properly cooperate with the locking key. Should the operator desire to shift the laten to the upper case position and lock t e parts in the shifted position, a downward pressure is exerted on the lock ing shift key 37. This is effective to depress the forward end of the shift lever 28,

thereby turning the rock shaft 29 and effecting an upward movement of both of the links 23 to move the platenv to uppercase position. As pressure is exerted on the finger key 37 to shift the platen. this pressure is effective as hereinbefore pointed out to turn the key 37 on its pivot 38 against the tension of the spring 41 until the engaging member 39 is brought into contact with the forward face of the inclined locking plate 49. This contact is maintained throughout the depression of the key and until the hook-like member 39 clears the lower edge 49 of the locking plate when the pressure exerted on the keywill force the hook-like engaging portion beneath the engaging edge 49 on the locking member as shown in Fig. 2, thus locking the parts in the shifted position. The pressure of the platen, platen frame, etc., exerted upon the shift lever 98 overcomes the pressure of the spring 41 so that-said spring is ineffective to restore the key 37 to normal position relatively lb the shift lever 28. lVhen, how ever, the operator desires to release the parts, it is merely necessary to exert a slight pressure on the shift key 35. This is eifectiveto overcome the excess pressure of the platen which maintains an effective engagement oe-' tween the parts 39 and 48. The spring 41- will then withdraw the engaging portion 39 from the cooperating fixed engaging member 43 and the shift keys and platen will be restored. to normal positions shown in Fig. 1.

For the purpose of my present invention it is immaterial what character of shifting platen is provided or what specific charparts for controlling'and looking I i cting a relative shift bethat temporary shift keys are provided at opposite sides of the keyboard for temporarily shifting the platen and enabling it to be restored to normal position when pressure is released upon either of the temporary shift keys; that the platen maybe moved to and locked in shifted position by a. pressure exerted upon the key 37; and that the parts may be readil 'released from the locked position by a sight pressure exerted upon the finger key-35.

What I claim as new and desire to Secure by Letters Patent, is h 1. In a typewrlting machine, the combination of type bars, a platen; and means for effecting a relative shift between the type bars an platen, said means] comprism two tem orary shift levers at] opposite" si es of the keyboard, temporary shi fixed to said levers, a roe shaftito which said levers are fixed, aspring-pressed look,- ing shift key pivoted to one of said shift levers on a ivot off-set from the locking shift key, and a locking member adjustably secured to a fixed part of the machine, said adjustable locking member having elined face with which a part of. the locking key is cooperative throughout a depression of the locking shift key.

2. In a typewriting machine, the combination of'type bars; a platen; and means for effecting a relative shift between the type bars and p ten, said means eomprisin two temporary shift levers'at oplposlte si es of the lazy-board, temporary sift keys fixed to sai t keys evers, a rock shaft to which said' levers are fixed, a locking shift key pivoted to one of said shift levers on a pivot off-set from the locking shift key, a stop which limits the movement of the pivoted shiftseam: 33

key in one direction on the shift; lever to i :icijusting means comprising a fulcrum and which it is pivoted, :1 spring which tends to set screws on opposite sides of said fulcrum. maintain the pivoted shift key against said i Signed at the borough of Manhattan, city stop, and a locking member adjnstably 59- I of'New Yoriq-in the county of New York,

5 cured to a fixed part of the machine, said and State of New York, this 21st day of i5 locking member having an inclined face March A. D1908. with which a part of the locking key is c0- SCAR WOODWARD. .Qperative throughout a depression of the Witnesses: locking shift key, and means for affording i CHARLES E. SMITH,

10 an adjustment of said locking member, said E. M. \VELLS. 

